JP2006150392A - Punch assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a punch assembly that improves production efficiency by curtailing the manufacturing time as a whole in manufacturing, that extends the service life of a punch head and a ring member by preventing their damage in punch machining, that simplifies the structure by eliminating excessive members other than fitting release bolts in rotating the punch head, and that enhances operability by reducing the number of times for screwing in the fitting release bolts in releasing engagement of the ring member. <P>SOLUTION: A plurality of through holes K are horizontally provided in the tubular part 32A of a punch head 32. At the same time, in the plurality of through holes K, there is inserted a holding piece 1 that is freely engaged/disengaged with a ring member 2. Also, on the inner circumference of the ring member and on the outer circumference of the holding piece 1, there are formed tapered parts 1A, 2A respectively corresponding thereto. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a punch assembly including a punch head loosening prevention mechanism.

  Conventionally, a punch assembly including a punch head loosening prevention mechanism is disclosed in, for example, Japanese Utility Model Publication No. 7-50024 and Japanese Patent Application Laid-Open No. 2003-136157.

  This punch head loosening prevention mechanism is formed with a punch head that is screwed into an upper end portion of a punch driver provided with a punch blade edge and formed with a slit, and a corresponding taper portion that fits into the taper portion of the punch head. A tightening member (ring member).

  With this configuration, when the ring member is pressed upward by the stripper spring, the punch head is fastened to the punch driver side by the action of both tapered portions.

  At this time, as already described, since the slit is formed in the punch head, the entire punch head deforms very easily, so that the upper end portion of the punch head becomes the upper end portion on the punch driver side. Firmly tightened against.

That is, the punch head is firmly tightened against the punch driver, whereby the punch head being processed is not loosened with respect to the punch driver, and the loosening prevention effect of the punch head is improved.
No. 7-50024 JP 2003-136157 A

  However, as described above, in the conventional punch head loosening prevention mechanism, a slit is formed in the punch head, and this slit must be processed in a separate process from the punch head.

  As a result, the manufacturing time of the entire punch assembly including the punch head in which such slits are formed becomes longer, so that the manufacturing efficiency is lowered. In addition, the manufacturing cost is also increased.

  Further, the punch head on which the slits are formed tightly holds the punch driver in a state where the slits are narrow, and therefore, even if the engagement of the ring member with the punch heads is released, the slits are separated. However, it cannot be restored with its own elastic force.

  Therefore, the punch head and the punch driver cannot be rotated relatively only by releasing the engagement of the ring member.

  As a result, in order to relatively rotate the punch head and the punch driver, a mechanism for forcibly expanding the slit is required in addition to the fitting release bolt for releasing the fitting of the ring member (for example, , A slit widening member disclosed in JP-A-2003-136157).

  In other words, conventionally, in order to relatively rotate the punch head and the punch driver, an extra member other than the fitting release bolt is required, and the configuration is complicated accordingly. In addition, the cost is high.

  Further, during punching, the punch head is struck by a ram, and the punch head is opened radially (in the radial direction) from the center by this struck pressure.

  As a result, the load based on the striking pressure from the ram concentrates on the fitting portion between the punch head and the ring member, and the fitting portion may be damaged.

  That is, when the punch head is opened radially, the ring member fitted to the punch head may be damaged, and the punch head may also be damaged.

  Furthermore, in order to sufficiently deform the slit and deform the entire punch head in which the slit is formed, the entire taper portion of the punch head is pressed against the entire taper portion of the ring member, thereby forming both taper portions. Is fitted deeply.

  As a result, when the fitting release bolt is screwed in and the ring member is lowered and the fitting of the ring member is released, the lowering distance of the ring member is increased by increasing the number of times of the fitting release bolt screwing. Therefore, the operability of the fitting release bolt is reduced.

  That is, when the fitting of the ring member to the punch head is released, the number of screwing of the fitting releasing bolt is increased, and the operability is lowered accordingly.

  An object of the present invention relates to a punch assembly having a punch head loosening prevention mechanism, and at the time of manufacturing, the entire manufacturing time is shortened to improve manufacturing efficiency, and the punch head and the ring member are damaged during punching. Prolongs the service life by preventing unnecessary members other than the mating release bolt when the punch head rotates, simplifying the configuration, and screwing the mating release bolt when releasing the ring member. Provided is a punch assembly in which the number of times is reduced and the operability is improved.

In order to solve the above problems, the present invention provides:
A punch head 32 is screwed into the upper end portion of a punch driver 31 provided in a cylindrical punch guide 30 so as to be movable up and down via screw portions 8 and 9 corresponding to each other. The threaded portion 9 screwed into the punch driver 31 has a cylindrical portion 32A and a flange portion 32B formed on the inner surface, and is attached to and detached from the ring member 2 provided on the lower surface of the flange portion 32B and the upper end portion of the punch guide 30. In a punch assembly in which a stripper spring 33 is provided between a freely provided retainer collar 36,
A plurality of through holes K are provided in a horizontal direction in the cylindrical portion 32A of the punch head 32, and a pressing piece 1 that can be fitted to and detached from the ring member 2 is inserted into the plurality of through holes K. A technical means called a punch assembly P is provided in which tapered portions 1A, 2A corresponding to each other are formed on the inner peripheral surface of the ring member 2 and the outer peripheral surface of the pressing piece 1.

  According to the above-described configuration of the present invention, the horizontal through hole K (FIGS. 2 and 3) is a conventional slit that is long in the vertical direction (the above-mentioned actual Japanese Utility Model Publication No. 7-50024, Japanese Patent Application Laid-Open No. 2003-136157). Unlike the publication, it is formed in the same process as the punch head 32, so that the manufacturing time of the punch head 32, and thus the manufacturing time of the entire punch assembly P, is shortened, thereby improving the manufacturing efficiency. Since the slit is not formed, the fitting of the ring member 2 to the holding piece 1 is released at the same time as the fitting release bolt 3 (FIG. 1) is screwed, and the punch head 32 is moved from the punch driver 31. Therefore, when the punch head 32 and the punch driver 31 are rotated relative to each other, an extra member such as a conventional slit widening member becomes unnecessary, and accordingly, the structure is increased. In addition, the ring member 2 (FIG. 1) is fitted to the holding piece 1 and is not fitted to the punch head 32, so that the fitting portion of the punch head 32 and the ring member 2 is fitted. Therefore, the load based on the striking pressure by the ram 35 at the time of punching is absorbed only by the punch head 32, and the punch head 32 and the ring member 2 are prevented from being damaged, thereby extending the life. Furthermore, since it is not necessary to deform the entire punch head by sufficiently bending the slit, the presser piece 1 and the ring member 2 (FIG. 4) are shallowly fitted via part of both the taper portions 1A and 2A. Therefore, when the fitting of the ring member 2 to the holding piece 1 is released, the number of screwing of the fitting releasing bolt 3 can be reduced, and the operability is improved.

  Therefore, according to the present invention, regarding a punch assembly having a punch head loosening prevention mechanism, at the time of manufacturing, the entire manufacturing time is shortened to improve manufacturing efficiency, and at the time of punching, the punch head and the ring member are Prevents damage and prolongs the service life. When the punch head rotates, it eliminates the need for extra members other than the mating release bolt and simplifies the configuration. When the ring member is released, the mating release bolt Therefore, it is possible to provide a punch assembly in which the operability is improved by reducing the number of times of screwing.

The present invention will now be described by way of example with reference to the accompanying drawings.
FIG. 1 is an overall view of the present invention, and shows a case where a punch assembly P according to the present invention is applied to a turret punch press.

  The turret punch press shown in FIG. 1 has an upper turret 6 and a lower turret 7, each having a punch assembly P and a die assembly D, and as is well known, the upper turret 6 and the lower turret 7. , The desired punch assembly P and die assembly D can be selected at the punch center C.

  A ram 35 is provided above the punch assembly P in the punch center C. When the punch head 32 of the punch assembly P is struck by the ram 35, for example, the work W Can be punched out.

  The punch assembly P has a cylindrical punch guide 30, and the punch guide 30 is supported by the upper turret 6 via a lift spring 34 and guided in the vertical direction.

  The retainer collar 36 attached to the upper surface of the flange of the punch guide 30 via an O-ring 37 is brought into contact with the lower end of the stripper spring 33, and the upper end of the stripper spring 33 contacts the lower surface of the ring member 2 described later. In contact therewith, the stripper spring 33 is covered with a cover 40 as shown.

  A punch driver 31 extending in the vertical direction passes through the punch guide 30, the retainer collar 36 and the stripper spring 33, and a punch head 32 is screwed into the upper end portion of the punch driver 31.

  A punch blade edge 38 is formed at the lower end of the punch driver 31, and the punch driver 31 has, for example, a male screw portion 8 at its upper end portion, and the male screw portion 8 has a corresponding female screw portion on the punch head 32 side. 9 is screwed together.

  The punch head 32 has a cylindrical portion 32A in which the female screw portion 9 is formed on the inner surface. The cylindrical portion 32A extends to the retainer collar 36, and a punch head is provided by a stopper 39 on the retainer collar 36 side. The movement distance in the vertical direction of 32 is regulated.

  The external appearance of the punch head 32 is as shown in FIG. 2, and has, for example, a disk-shaped flange portion 32B together with the above-described cylinder portion 32A (FIG. 3A).

  A screw hole 3A is formed in the flange portion 32B, and a bolt 3 (FIG. 1) for releasing the fitting of the ring member 2 to the pressing piece 1 described later is screwed into the screw hole 3A. The lower end of the fitting release bolt 3 is in contact with the upper surface of the ring member 2, and the upper end of the stripper spring 33 is in contact with the lower surface of the ring member 2 as described above.

  An outer peripheral surface of the cylindrical portion 32A constituting the punch head 32, and a region in the vicinity of the flange portion 32B is a flat surface 32C (FIGS. 2 and 3), whereby a thick portion of the cylindrical portion 32A is obtained. The through hole K, which will be described later, can be easily processed.

  The flat surface 32C (FIG. 3) is located on the opposite side to the female screw portion 9 on the inner surface of the cylindrical portion 32A (FIG. 3B), and is a through-hole penetrating from the flat surface 32C toward the female screw portion 9. A plurality of K are provided in the horizontal direction.

  A presser piece 1 that can be freely fitted to and detached from the ring member 2 is inserted into the through hole K, and an inner peripheral surface 1B of the presser piece 1 is opened inside the through hole K (FIG. 5). The portion K <b> 2 protrudes and comes into contact with the male screw portion 8 of the punch driver 31.

  In this case, an internal thread portion can also be formed on the inner peripheral surface 1B of the presser piece 1, whereby the internal thread portion of the presser piece 1 and the external thread portion 8 of the punch driver 31 are engaged with each other. The contact state of the piece 1 with respect to the punch driver 31 becomes complete, and the positions 1 and 31 do not shift.

  A taper portion 1A is formed on the outer peripheral surface of the pressing piece 1 (FIG. 3), and a tapered portion 2A corresponding to the taper portion 1A of the pressing piece 1 is formed on the inner peripheral surface of the ring member 2, respectively. Both the taper portions 1A and 2A are fitted to each other in a state of protruding outward from the through hole K (FIG. 4).

  With this configuration, the ring member 2 is pressed upward by the urging force of the stripper spring 33. At this time, the taper portion 1A of the presser piece 1 inserted into the through hole K has a taper portion of the ring member 2. For example, a vertical force F is applied from the 2A side.

  In this case, when the inclination angle of both the taper portions 1A and 2A is θ, the force F applied from the ring member 2 side to the pressing piece 1 side is a horizontal component force F × tan θ as shown in the figure. Then, it can be decomposed into a component force F × (1 / cos θ) obliquely upward.

  Of the component forces, the holding piece 1 is firmly fixed to the male screw portion 8 of the punch driver 31 screwed into the punch head 32 (FIG. 1) by the horizontal component force F × tan θ. By being tightened, loosening of the punch head 32 is prevented.

  That is, since the punch head 32 is fixed by the presser piece 1 firmly fastened to the punch driver 31 screwed to the punch head 32, the punch driver 31 is not pressed against the punch driver 31 even if it is struck by the ram 35 during processing. The punch head 32 cannot be rotated in the clockwise direction or the counterclockwise direction. Therefore, as described above, the punch head 32 is prevented from loosening.

  The pressing piece 1 (FIG. 5) is tapered from the tapered portion 1A toward the inner peripheral surface 1B on the opposite side, and the size of the tapered portion 1A is larger than the size of the outer opening K1 of the through hole K. The dimension of the inner peripheral surface 1B is smaller than the dimension of the inner opening K2 of the through hole K.

  That is, when viewed from above, the through hole K is constituted by a linear outer opening K1, an arc-shaped inner opening K2, and linear both side walls K3 and K4 orthogonal to the outer opening K1. ing.

  The width A (Y-axis direction) of the tapered portion 1A of the presser piece 1 is larger than the width of the outer opening K1 of the through hole K, and the width B (Y-axis direction) of the inner peripheral surface 1B of the presser piece 1 ) Is smaller than the width of the inner opening K2 of the through hole K.

  Further, the height (Z-axis direction) H of the entire pressing piece 1 is substantially the same as the height of the through hole K (FIG. 3B).

  With this configuration, when the presser piece 1 is inserted into the through hole K (FIG. 5), the inner peripheral surface 1B of the presser piece 1 protrudes from the inner opening K2 of the through hole K, and the male screw part of the punch driver 31 8 can be contacted very easily.

  Further, the pressing piece 1 inserted into the through hole K does not fall off inside the cylindrical portion 32A of the punch head 32 even when the punch driver 31 is removed from the punch head 32 during maintenance of the punch assembly P or the like. .

  That is, at the time of maintenance of the punch assembly P, the fitting release bolt 3 is screwed (FIG. 1) so that the fitting of the ring member 2 to the pressing piece 1 is released and the pressing piece 1 is fixed to the punch driver 31. The punch driver 31 may be removed from the punch head 32 after the tightening force is weakened.

  In this case, as described above, if the dimension of the taper portion 1A of the presser piece 1 is larger than the dimension of the through hole K, the punch head 32 that has been emptied after the punch driver 31 is removed can be used. The pressing piece 1 does not fall off inside the cylinder portion 32A.

  Further, the plurality of through holes K and the pressing pieces 1 inserted into the respective through holes K are, for example, radially arranged at equal intervals, whereby the holding piece 1 is connected to the male screw portion 8 of the punch driver 31. On the other hand, since it is tightened more firmly and uniformly, the punch head 32 is further prevented from loosening, and the loosening prevention effect is improved.

  FIG. 6 is a view showing another embodiment of the presser piece 1 constituting the present invention, which is the same as FIG. 5 in that it is tapered from the tapered portion 1A toward the inner peripheral surface 1B. However, it differs in having a head 1C and a body 1D having a step.

  In other words, in the case of FIG. 5, the presser piece 1 extends from the tapered portion 1 </ b> A having the width A (Y-axis direction) larger than the width of the outer opening K <b> 1 of the through hole K to the inner opening K <b> 2 of the through hole K. The width gradually decreases toward the inner peripheral surface 1B having a width B (Y-axis direction) smaller than the width.

  On the other hand, in the case of FIG. 6, the presser piece 1 has a step 1 </ b> C with a head 1 </ b> C having a tapered portion 1 </ b> A having the width A on the outside and the same overall width A. Thus, the body 1D has a body 1D which is sharply thinned, has an inner peripheral surface 1B having the width B on the inner side, and has the same overall width B.

  6, the body 1D is inserted into the through hole K, and the head 1C protrudes outward from the through hole K, as illustrated.

  With this configuration, the inner peripheral surface 1B of the body 1D of the presser piece 1 protrudes from the inner opening K2 of the through hole K and comes into contact with the male screw portion 8 of the punch driver 31, and the taper of the head 1C of the presser piece 1 is increased. The portion 1A is fitted to the tapered portion 2A of the ring member 2 in a state of protruding to the outside of the through hole K (corresponding to FIG. 4), and similarly, the horizontal direction from the ring member 2 side Due to the component force F × tan θ, the pressing piece 1 is firmly tightened against the male screw portion 8 of the punch driver 31 screwed into the punch head 32 (FIG. 1), so that the punch head 32 is loosened. Is prevented.

  Further, the head 1C of the pressing piece 1 protruding outward from the through hole K (FIG. 6) has a tapered portion 1A having a width A larger than the width of the outer opening K1 of the through hole K as described above. At the same time, the overall width is also A, and the inner side 1E of the head 1C is in contact with the flat surface 32C on the outer opening K1 side of the through hole K as shown in the figure.

  With this configuration, during maintenance of the punch assembly P (FIG. 1), the fitting release bolt 3 is screwed in and the fitting of the ring member 2 to the holding piece 1 is released, so that the holding piece 1 is attached to the punch driver 31. Even when the clamping force is weakened and the punch driver 31 is removed from the punch head 32, as described above, the head 1C of the pressing piece 1 that is in contact with the flat surface 32C does not enter the through hole K side. For this reason, similarly, the pressing piece 1 does not fall off inside the cylindrical portion 32A of the punch head 32 that is empty after the punch driver 31 is removed.

  The operation of the present invention having the above configuration will be described below.

  At the time of punching, when the workpiece W (FIG. 1) is placed on the die body 5 of the die assembly D and then the punch head 32 is struck by the ram 35, the lift spring 34 is first bent and the tip of the punch guide 30 is bent. The plate presser 11 presses the upper surface of the workpiece W. In this state, the stripper spring 33 is then bent and the punch driver 31 is lowered, and the punch blade tip 38 at the tip thereof passes through the blade tip insertion hole 10 formed in the plate presser 11. After that, the workpiece W is lowered from the upper surface of the die body 5 on the die assembly D side to a predetermined position, and the workpiece W is punched in cooperation with the die cutting edge 4.

  In this case, according to the present invention, the ring member 2 is fitted to the holding piece 1 and is not fitted to the punch head 32.

  Therefore, there is no fitting portion between the punch head 32 and the ring member 2, and therefore, even if the punch head 32 is struck by the ram 35 during the punching process described above, the load based on the struck pressure is not reduced. Absorbed only by the head 32, the punch head 32 and the ring member 2 are prevented from being damaged, and the life of the punch assembly P is prolonged.

  Further, according to the present invention, the horizontal through hole K into which the presser piece 1 is inserted is formed in the same process as the punch head 32 processing process.

  Therefore, the manufacturing time of the punch head 32, and hence the manufacturing time of the entire punch assembly P is shortened, so that the manufacturing efficiency is improved.

  Furthermore, according to the present invention, the punch head 32 is not formed with a slit as in the prior art, so that the presser piece 1 of the ring member 2 can be simply screwed in without disengaging it. The punch head 32 is released from the punch driver 31 at the same time as the fitting to is released.

  Therefore, when the punch head 32 and the punch driver 31 are rotated relative to each other, an extra member such as a conventional slit widening member becomes unnecessary, and the configuration is simplified correspondingly.

  Furthermore, according to the present invention, since it is not necessary to deform the entire punch head by sufficiently bending the slit, the presser piece 1 and the ring member 2 are shallowly fitted via part of both the taper portions 1A and 2A. is doing.

  Therefore, when the fitting of the ring member 2 to the holding piece 1 is released, the number of screwing of the fitting release bolt 3 can be reduced, so that the operability is improved.

  As described above, the present invention relates to a punch assembly provided with a punch head loosening prevention mechanism, and at the time of manufacturing, the entire manufacturing time is shortened to improve manufacturing efficiency. Prevents damage and prolongs the service life. When the punch head rotates, it eliminates the need for extra members other than the mating release bolt and simplifies the configuration. When the ring member is released, the mating release bolt This is useful for improving the operability by reducing the number of screwing operations. Specifically, not only a turret punch press, but also a punch press that processes with a single die, and more than one die on the side. It is also applied to a single punch press that stocks and takes out a necessary single die from the stock.

1 is an overall view of the present invention. It is an external view of the punch head 32 which comprises this invention. It is a figure which shows the relationship between the punch head 32 which comprises this invention, the pressing piece 1, and the ring member 2. FIG. It is action | operation explanatory drawing of the ring member 2 with respect to the holding piece 1 which comprises this invention. It is a figure which shows the shape of the pressing piece 1 which comprises this invention. It is a figure which shows the other Example of the presser piece 1 which comprises this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Holding piece 1A Tapered part 1B Inner peripheral surface 1C Head 1D Body 1E Inside 2 Ring member 2A Taper part 3 Fitting release bolt 3A Screw hole of fitting release bolt 3 4 Die cutting edge 5 Die body 6 Upper turret 7 Lower turret 8 Male thread portion 9 Female thread portion 10 Cutting edge insertion hole 11 Plate retainer 31 Punch driver 32 Punch head 32A Tube portion 32B Flange portion 32C Flat surface 33 Stripper spring 34 Lift spring 35 Ram 36 Retainer collar 37 O-ring 38 Punch cutting edge 39 Stopper D Die assembly Solid P Punch Assembly W Workpiece

Claims (4)

A punch head is screwed into an upper end portion of a punch driver provided in a cylindrical punch guide so as to be movable up and down via screw portions corresponding to each other, and the punch head is screwed into the punch driver. A stripper spring between a ring member provided on the lower surface of the flange portion and a retainer collar detachably provided on the upper end portion of the punch guide. In the punch assembly provided with
A plurality of through holes are provided in a horizontal direction in the cylindrical portion of the punch head, and a pressing piece that can be fitted to and detached from the ring member is inserted into the plurality of through holes, and an inner peripheral surface of the ring member A punch assembly characterized in that tapered portions corresponding to each other are formed on the outer peripheral surface of the holding piece. The holding piece is tapered from the tapered portion toward the inner peripheral surface on the opposite side, and the dimension of the tapered portion is larger than the dimension of the outer opening of the through hole. The punch assembly according to claim 1, wherein the punch assembly is smaller than a dimension of the inner opening of the first assembly. The punch assembly P according to claim 1 or 2, wherein the plurality of through holes and pressing pieces are radially arranged at equal intervals. The lower end of the fitting release bolt is in contact with the upper surface of the ring member, the upper end of the stripper spring is in contact with the lower surface of the ring member, and the tapered portion of the ring member is in contact with the through hole. An inner peripheral surface that is fitted to the taper portion of the inserted presser piece and that is opposite to the taper portion of the presser piece protrudes from the inner opening of the through hole and is in contact with the screw portion of the punch driver. Or the punch assembly P according to 3.

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